From 20cdc391fccc8a81634cadc071cb2b6f7cc4af24 Mon Sep 17 00:00:00 2001
From: Shicheng Chu <1468559561@qq.com>
Date: Tue, 16 Jan 2024 14:01:19 +0800
Subject: [PATCH] [bsp][pico]: add rtc driver (#8492)

---
 bsp/raspberry-pico/Kconfig            |   6 ++
 bsp/raspberry-pico/drivers/SConscript |   3 +
 bsp/raspberry-pico/drivers/drv_rtc.c  | 124 ++++++++++++++++++++++++++
 3 files changed, 133 insertions(+)
 create mode 100644 bsp/raspberry-pico/drivers/drv_rtc.c

diff --git a/bsp/raspberry-pico/Kconfig b/bsp/raspberry-pico/Kconfig
index a88ee42a25..56bda50324 100644
--- a/bsp/raspberry-pico/Kconfig
+++ b/bsp/raspberry-pico/Kconfig
@@ -234,6 +234,12 @@ menu "On-chip Peripheral Drivers"
         select RT_USING_WDT
         default n
 
+
+    config BSP_USING_RTC
+        bool "Enable RTC"
+        select RT_USING_RTC
+        default n
+
     menuconfig BSP_USING_SPI
         bool "Enable SPI"
         select RT_USING_SPI
diff --git a/bsp/raspberry-pico/drivers/SConscript b/bsp/raspberry-pico/drivers/SConscript
index 2b92315914..dbd1b4f654 100644
--- a/bsp/raspberry-pico/drivers/SConscript
+++ b/bsp/raspberry-pico/drivers/SConscript
@@ -37,6 +37,9 @@ if GetDepend('BSP_USING_PWM'):
 if GetDepend('BSP_USING_HWTIMER'):
     src += ['drv_hwtimer.c']
 
+if GetDepend('BSP_USING_RTC'):
+    src += ['drv_rtc.c']
+
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/bsp/raspberry-pico/drivers/drv_rtc.c b/bsp/raspberry-pico/drivers/drv_rtc.c
new file mode 100644
index 0000000000..8f37fd409f
--- /dev/null
+++ b/bsp/raspberry-pico/drivers/drv_rtc.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date         Author        Notes
+ * 2024-01-13   ChuShicheng   first version
+ */
+
+#include "board.h"
+#include <rtdevice.h>
+#include "hardware/rtc.h"
+#include "pico/util/datetime.h"
+
+#define DBG_LEVEL   DBG_LOG
+#include <rtdbg.h>
+#define LOG_TAG "DRV.RTC"
+
+struct rtc_device_object
+{
+    rt_rtc_dev_t  rtc_dev;
+};
+
+static struct rtc_device_object rtc_device;
+
+static rt_err_t pico_rtc_get_timeval(struct timeval *tv)
+{
+    datetime_t t;
+    struct tm tm_new = {0};
+    rtc_get_datetime(&t);
+
+    tm_new.tm_sec  = t.sec;
+    tm_new.tm_min  = t.min;
+    tm_new.tm_hour = t.hour;
+    tm_new.tm_wday = t.dotw;
+    tm_new.tm_mday = t.day;
+    tm_new.tm_mon  = t.month - 1;
+    tm_new.tm_year = t.year - 1900;
+
+    tv->tv_sec = timegm(&tm_new);
+
+    return RT_EOK;
+}
+
+static rt_err_t pico_rtc_init(void)
+{
+    rtc_init();
+
+    datetime_t t;
+    t.sec     = 0 ;
+    t.min     = 0;
+    t.hour    = 0;
+    t.day     = 01;
+    t.month   = 01;
+    t.year    = 1970;
+    t.dotw    = 4;
+    rtc_set_datetime(&t);
+
+    return RT_EOK;
+}
+
+static rt_err_t pico_rtc_get_secs(time_t *sec)
+{
+    struct timeval tv;
+
+    pico_rtc_get_timeval(&tv);
+    *(time_t *) sec = tv.tv_sec;
+    LOG_D("RTC: get rtc_time %d", *sec);
+
+    return RT_EOK;
+}
+
+static rt_err_t pico_rtc_set_secs(time_t *sec)
+{
+    rt_err_t result = RT_EOK;
+    datetime_t t;
+    struct tm tm = {0};
+
+    gmtime_r(sec, &tm);
+
+    t.sec     = tm.tm_sec ;
+    t.min     = tm.tm_min ;
+    t.hour    = tm.tm_hour;
+    t.day     = tm.tm_mday;
+    t.month   = tm.tm_mon  + 1;
+    t.year    = tm.tm_year + 1900;
+    t.dotw    = tm.tm_wday;
+
+    rtc_set_datetime(&t);
+    LOG_D("RTC: set rtc_time");
+#ifdef RT_USING_ALARM
+    rt_alarm_update(&rtc_device.rtc_dev.parent, 1);
+#endif
+    return result;
+}
+
+static const struct rt_rtc_ops pico_rtc_ops =
+{
+    pico_rtc_init,
+    pico_rtc_get_secs,
+    pico_rtc_set_secs,
+    RT_NULL,
+    RT_NULL,
+    pico_rtc_get_timeval,
+    RT_NULL,
+};
+
+static int rt_hw_rtc_init(void)
+{
+    rt_err_t result;
+
+    rtc_device.rtc_dev.ops = &pico_rtc_ops;
+    result = rt_hw_rtc_register(&rtc_device.rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL);
+    if (result != RT_EOK)
+    {
+        LOG_E("rtc register err code: %d", result);
+        return result;
+    }
+    LOG_D("rtc init success");
+
+    return RT_EOK;
+}
+INIT_DEVICE_EXPORT(rt_hw_rtc_init);